Power-control mechanism



Nov. 4, 1930. F. L. DAKE POWER CONTROL MECHANISM Filed April 12, 1929 3 Sheets-Sheet, 1

Red L.D,a1ce,

ATTORNEY,

Nov. 4, 1930. F. L. DAKE POWER CONTROL MECHANISM Filed April 12. 1929 3 Sheets-Sheet, 2

INVENT OR;

' .F:edL.D,alce, @ZwflM ATTORNEY Nov; 4, 1930. F. L. DAKE 1,780,869

POWER CONTROL MECHANI SM Filed April 12, 1929 3 Sheets--Sheet, 3

I]! INVENTOR Z 1 5mm? L. ZZake,

ATTORNEY FRED L. BAKE,

Patented Nov. 4, 1930 UNITED S ATJE 1 rownn-oonrnonaincnenism Application m April 12,

-My invention relates to new and'useful improvements in controls, and'mor'e especially to controls that are power-operated, it being only necessary to throw a small handle into engagement with a cam on an oscillating shaft so that the oscillating shaft will mechanical ly operate the desired control to thereby; in turn throw into or out of engagement the-part to be operated.

"One of the objects of the invention is to provide a means whereby the operator isrelieved of the usual manual throwing of a control lever-or levers and is accomplished by providing special forms of control levers, each of which is provided with a small pivotal handle, which, when tilted, will lock its lever to an oscillating, shaft, so that the shaft willmechanically operate the control'lever.

Still another object of the invention is to provide a power-operating control mechanism that is especially adapted to beus'ed with a"c-oncretepaver,' wherein one control may be used forjthe turning on andoft of the water for themixing' drum while another control may be used forthrowing into engagement the power that operates theskip'.-

' Another object of the invention is to provide a power-operating control mechanism whereln means are connected w th the'dru'm' ofa concrete paver tooscillat'e a controlsh'aft on which the various controls are idly mount ed andto provide simpleinterlocking han- 4 I to provide a=power control mechanism which,

although especially adaptable for usein com junction with "a c oncrete payer or" mixer,

dles, anyone of which may be tilted to tendporarily look its control toithe control shaft: Still anotherobject of the invention is to provide a power control mechanism havingan oscillatable shaft on which the various controllevers are idly mounted, and to provide a shiftable handle on 'each of the controls, wherein, any one of these han dles may be'shifted to temporarily lock its control p with the shaft to thereby operate the'con'trol int-he one direction or whereby the handle may be tilted in the'oppositedirectionto lock the control to the'shaft and-cause the control lever to operate in the opposite direction.

Still another object of the invention is to provide a cont-rolmechanism which is of simple design and construction andcomprlses 1n 1 the main an oscillatable shaft, togetherwith- Nith'these means for causing the same to oscillate Mounted on the oscillating shaft are as many 5 PATE Nr o FrcE; a

or nNDA, NEwj YO K, ASSIGNOB TO THE FOOTE COMPANY, mo, 0]! nouns, NEW ,YoRK, A CORPORATION or DELAWARE contl'ol' levers as desirechand these control levers are so arranged'that any one of them,

may be quickly locked to the oscillating shaft to thereby cause the oscillating shaft tomes m ally operate the predetermined contrel' V lever.

Still another object of the invention. provide a power-control mechanism wherein the predetermined control lever may be temporarily locked toan oscillating shaft,

and after the control lever is operated by the oscillating shaft, it will be again unlocked therefrom and the control lever remainsfin the position to which it has just been moved.

Still another object of the invention is to provide a power-operated controlthat may be particularly adaptable to the controlling of the water and skip of a concrete payer. Also, the power-operatedcontrol for the skip is interconnected with a lever for the manual control of the skip, ,rn aking it possible to lower the skip manually which' is desirable: Again, w1th the present invention, the power controlof the skip being interconnected with" the manual. control makes it possible" to 'en- .Y

tirelydisengag'e the automatic control and permits" the skip to becontroll ed in" both its raising and lowering movementswhol'ly by;

the manually operatedcontrol."

still another object of the magnetite mightequallyjaswell be used in conjunctionwith other p ower-operated machinery. As is well" known, control levers when control lever.

arrangements and combination of par-ts, as

ly perform tne operationof throwing the and other objects'in view, the ,lHVQIllJIOII consists in'certain new and novel lGU will be hereinaftermore fully described and pointed out in the claims. V Referring now to the drawings showing 'a p referred embodiment of my invention;

Fig. 1' is a View partly in seetion and part ,ly in elevation of my "improved control mechanism, showing the manner inwhlchv the rnain control shaft is o ierat e d. and show- I ing manualjcontrol lever interconnected with i one of i-thespowercontrolled leVers.:-- i F 1g; '2 's a fragmentary View partly in sec; .1

tion and 'partly in elevation, showing the power control lever and amanuallyoperated lever for also controlling therpower operated lever, this 1 interconneetedffl control being} speci lyad pted r C ol er mnients of thejp asver skip. r r

g: 3 s a, fragmentary side el'eration of concrete, payer, 2 showing J the. 4 improved wer control mechanism; also showlng the r it manua ly ga trena operated leyerinterconr "I e i l iw h 1 tt e Power ee t f v i'e I 3 for controlling the movement of the paver f fskip. i r

Fig. Isis fragmentary sectional View of a; i frame of a payer, showlnginelevatlon one of' ."the,power operated control levers mounted;

the control, shaft and illustrating the man- 'nerlin whichvthecontrol leyer is to belocked andfilnlocked from the'j control shaft. Fig.5 is it'VlGW sim lar to -l*f1g. 4 but-show control shaft aiid oontrol lever after being rocked to; its opposlite position; the l;- c .ontrol being of the double-toothed type fol hrowing the controlintotwo different positions, and especially adapted for. controlling -.t11ei'wate1-, for theemix ingdrnm. ofthe payer. Fig.- 6 is a rmgm pm eemn yiew showilg p e c ti l owe le too he typ andiiiespecially adapted ,fiar controlling the le n Io tl kipt e -0 1 39 l ve v ng shown-as thrown; to its' operative position; 7

' Eigi is a view similar tO Fig. 6 showing 5 the control lever vnormal positionfand ,1 7 {gear wheel 8, Whichis mounted onthe stub' r shaft 9and eccentrioally mounted on this gear iiF si a Per ti e of b t i 'h e andfdouble.toothed cams 1 f Referring now more in -whichyis mounted;on'efend of a shaft- 5j2tndfalso on the end of'thisyshaftyis the V Sma'llspilnPiniOn; 6 designed to-fmesh withthe ring gear send be driven thereby; I Spaced over fromfthe pinion6on theshaft 5is a furtherpiniony'z' designed to drive a wheel 8 is the connecting rod:1O,4which latter T has s curedat. its outer end a small socket.

' to whichjispivoted the l w r, end of'th v by? v particularly toFigs' 1 d.figth ewil es ena gm yrp tti0n.of ;the frame Q1 ofaeoncrete paver, there {also'being shown the mixing drum 2 with a j' 1' s rr ngr ..3\.'.Whih is n. h o h? a? eie drive he h n);f t gasol' engine;tha t' is sed to driveflthepaver. here willla'lso be seen: in Fig. l-a bearing r arm 12 whioh, in turn, is secured to one end 1 of the maincontrol or oscillatable shaft'13.

This control shaft 13 suitablyimountedin the bearings 14 secured to the framed, as

may be seen in Fig. 1 r 'l\ ow whenever the mix ng drum 2 is driven, it will;, thlfou'gh 'the gears p'inionsand arm just mentioned, oscillate or rock the shaft 13 as will be 'perfectly' plain.

The rocking oroscillation of this eontrol shaftisfrom-the one limit," as shownin Fig.: A: to the otherlimit, as shown in Fig; 5. It is' to thi s co ntrol shaft-'13-that the Various controls or levers are tobec'OnneCted, and itwill be understood that although, in the present instance, I have; only showntwo con trolls, as ,operatedby' this -rock shaft,= -any number. eouldzwbe need lengthening; ,the5

Referring l there is shown'acontrolor linkrod lithat ex ds va o i he .f-rq rface o the dr m and has the: bifurcated endlfir -{conneeted to: '17 which,- initufn,

one a-rm of'a b'ell crank may be connected to ,the tank (not shown). tank is' shown in a l yd v nney 0 eb ua y water measuring This ter measu in h r P ing pp ation filed 1929, and bears Serial N m 340,179- 0f paver, as here describedand' illustrated. 5 T

some other rod whiclifln-'turn,*wiIl;-be'eon r- I nested; tea-part to be operated, but the con-j trol mechanism as describedjin this applicas,

tion, lS QIlQ that is 'actually usedonethe F oote paver, andgthe controls here shown are actnj ny, connected}; to the mechanisms oft-the V, NoWathe. other end oi he, link rod 151i;

connected to eleven-'18 which is" looselymounted ontheoontrol shaftll'3 and'extends upwardly 'beyOnd the shaft; '13, as maygbe v seen more'clearlyin Eig'sr andY5, JAt'the upper end 1931f this leVerj-l8isthe smallconef to the-shaft; 13; V

1In the fOr msQf; controlshown iand 5,-,the d0ge22' is provided with-Itheqtwo Y 7 teeth25land26', whileithecam member'23has; v the-two ja w's 27 and 28-vcut: on its'periphery" forselective engagement:byrthe-teethgofthef 7 dog or pawl .22; that is,sthef'tooth- 25' may be thrown into engagement with the jaws-2 7, for:

the" :toothf26 ,Inay he ;:thrown into engagement with'the jaw 28, as :iWlll "be shortly V descfibed. Fig. 4,.there willg'besee'n asmall selzf-z centering, arrangement. for the :handle; '20,; siich. as the 'spring '29; fitting up within the:

i i I tooth 26 and will also prevent" the aw '27 handle that presses against the small ball,

7 hold the pawl outof engagement from the jaw 27 or the jaw 28. The operation of the above control mechanism will be set out and then reference will be made to a slightly'different control mechanismthat isespecially adaptable to controllingthe skip mechanism.

Supposing it is desired to push the link rod 15 toward the left, as seen from Fig. 1 to operate a ;water valve (not shown), the little handle 20 (see Fig. '5) on the lever 18 will be slightly tilted toward the operator,

so that the tooth 26 of the pawl 22, will engage thejaw 28 of the cam 23. .Now the connecting rod '10 is oscillating the-shaft 13, through. the ring. gear and spur gear,-and

the tooth 26 will be engaged-bythe jaw 28 of the cam, as the handle has been tilted and causes the pawl, to slip-in the path, of the. jaw 28. 7 An oscillation ofthe main control shaft 13, now locked bythe pawl to the cam,

., will cause the lever 18 to rockwit-h-the control shaft and force the rod 15 to the leftand thereby operate thebell crank, which is connected to 'thegwatertank (not shown).- Tjhe small handle 20 will now bein the position shown in'Figs. -1 and 4. V

The handle 20 is then released by the operator, and thefhandle will 'right or normalize itselfby the self-centering device, as

described, and moves from the full line to the dotted line position (Fig. 4). On the re turn oscillation of the control shaft,'and-its cam, the-jaw 28 of, the camfwill ride away from the tooth 26 even if the handle .has5not' had time to normalize itselflor, if the handle 20 is in its normal position, it will clear the engaging with theoppos'ite tooth 25 of the awl. r

The link rod 15, therefore, and its lever 18 willnow simply idle von the shaft 13'1while the'latteroscillates back and; forth S upposing it is desired to pull the'rod'15 to the i right, to operate the bell crank 17 in the other direction,- the little handle 20. will be simply tilted forwardly (Figgt) by the operatorunti'l the tooth 25 engages the .27

ofthe oscillatingcam 23-andth'e moment the'tooth 25. does engage with thejaw 27 the oscillation ofthe shaft 13 anjdits cam willrock the lever 18 to the positionshowne in Fig. 5 and thus pull the bell crank 17 Theha-nd of the operator may be removed. from -thehandle 20 assoon as the tooth 25 has engaged with the jaw 27 and the handle will center itself, so that it will again assume, the position shown in Fig. 5.- Thus,it will be seen that instead ing' a long; manual lever connected to the link rod15 andoperating the 'same .manu-. ally, with the arrangement shown it is-sirnof hay ply necessary to rock vor tilt thelittle handle 20 with its fixed 'frame,'so that the samewill engage the desired cam jawfwhile'the oscillating or rocking of the control shaft 13 will.

desired to operate a control in one direction only to. -xprovide a, manuahlever for reiversing the operation, or doing'both manually, I ha ve-{shown another similar form'of control, but-with the power operated control acting in onedirection only-and a separate manually operated means for. operating this control in thegopposite direction, orithe manually operated means controlling the action in both directions. 1 I 1 i It An arrangement of this kind is especial-lya desirable when the'control is usedona con-. crete paver because it. is desirable to-control by power the means for elevating'theskip and, on the other hand, it is desirableto-have a manually controlled brakefor lowering'fthe skip just as fastor as slowly as needed;

' The present invention, therefore,contemplates a mechanical control for rocking a shaftin one direction .-(.to elevate the skip); the 'control;,- in turn, being-connected with a hand lever 'jfo'r throwing into oroutof action the powerqcontrol; and also for rockinglthe shaft in the other direction to applya brake i to the skip hoistingme'chanism '(not'shown) tothus-let the skip down as slowly .as de-r is splined to the-shaft in the same manner as a the formerly} mentioned cam 23. *At the outer end. 31 of the lever is the small control handle 38; toi-whichis fixedly mounted "the small pal-W134, but this; pawl has. only the one jaw or tooth;.35." At its'ofpposite end, there is connected alsmall spring 36, which isalso connected to'thecr'ank lever 31 at the point 37, so.

be raisedand may not accidentally engage with the jaw 38 "arranged on .theqperipheral edge of the cam 32, as may be seen in the soy eral'viewsyf .1

. that normally:v the tooth 35 of the pawl'will v {to the drum: FForthe,purpose'of'understand- It will be noticedgthat this smallhandle '33 spring 36, so that-fthere 'is never the; possibility-of the-ftooth 3 5 accidentally coining into engagement with the jaw 38 'of the cam, uno 7 less the small'h'andle 33: is moved or rocked-J V one tooth on the pawlfandonly one tooth-on V by the operators Gonnected to the outer-"end of thie lever 6 j is the link control rod 39, and referring to Figs. 1, 2 and"3, it will-be seen that: the lower end of'the rod 39 is connectedto the arm4O mounted on'a shaft 41, and this shaft 41 C011 q trols a cable drum (not shown) for "raising andlowering a skip, and for appl-yingabrake in'gl thisi'nv'ention, it is only necessary to say that'lwhen the shaft "41 is rocked" by an u wardmovenient of the arm 40,-:a skip"i(=not shown) will-beraised,'and when the armao i's' forced downwardly and the Shaftfll is rocked in theopposite direction ,abrakeE-( not shown) I will be applied to" the ski'priThe skip is not shown no'r its "elevating mechanisinfas it is itrol described is for-rocking @Shl-fi lh two directions which might be connected to any desiredfmechanismw only: necessary to understand that theeon Mounted' loosely on the'shaft 41' is the casting 42 from whichextends the manually operable lever 43. This casting .Widen's 1 out, as maybe seen at 44, andis provided with an upper pin ""and alower pin 46'fwhich extendi outwardly to-eng'age the arm 40 when' the-lever isfor'ced tothe left andrightI V There may also be seen; the-two efgualiZingv I springs'eit andat together withthei'r' rod or'f V keepergi'wh-ic'h'latter is pivotally seoured to 'th'e'casting42, so that the casting 42 and the lever. 43 will be normallyheld in their posi f g shaft 4l", -which ,vin' turn-, itinay' beassunied tion shown in Fig. 2 and 'thus 'inter-fere causes a 'skip (not shown) to be'jeleVatedQ 16 'I 7 will also be understood that when the iro'df 39 is lowered, fit'will rock the shaft;41 in the} V, opposite-direction and let the skip downfas slowly as desired; as it has 'alreadybeen- 'inen tioned that-a rocking of theshaft in this 'direction wil i j-anism. e 1 :1 V

" Referring again tothe pontro1 ;and thehan, dle, 33, "and supposing it is desired to rock the lapply a brake to .thejs k shaft41 upwardly' to gelevate the skip not shown) ,;the i smallvhandlej 33 'will be 'pu led i downwardly untilithe t'ooth 35'Yof'1thepawl1 34'is engaged'bythetooth 38 of- 'the cam, and asithe' cam and control shaft 13' are" oscillated by: the "connecting-rod '10, the aim 31' being 'now'ilocked to'the; shaft 13 through-the earn andathevpawl the 1 rod 39 i will be elevated and band t-from thehan'dleiway inwhicha manualicontrol inay Cooper vthe shaft'4lrocked 4. l

s The small handle 33;will beoreleased'as' -"Inech-f V p p I 'te'r-a'nd;likewisetoitheotherside of-lthe-cnteri Agai'n,iI have sh'ownaslightly' jferent I 120,1

soon as thepziwl has ibee'n'thrownqqut of en gagem'ent with the cam tooth', and as th'e 'sh'aift oscillates back and forth, the sl;ip control 39 will: remain over 'in its thrown position'Until] v inove'cl by the h'and leveri43, In-"otherwords,

this small;(skimontrolhandle is onlyto be. operated-in the one direotion,-asthere is o'nly ated in either one of twodirections-.-

the (skip) 5 co 'itriol handleits neutr'al pest tion' 'ian'd I' have also; shown it in its'operative position orpulled downwardly,=as-in Fig; 6.

f-VVhen the -control is" used' -for regulating the action of the skip, it "is-always:desirable to lower the skip-by thenianu'ally operated I levei 43 and when the sanie -is forced to the left,' *tlie pin '45 will clont'actiwith the-arm 40 a and thus-rocktlies'haft 41 which wi11 a p1y a' V brake (not shownfto 'the skip controlling niee'hanjsm gso that llQQB P m be lldwerdi I i nae. iAlsmbv forcing the lever 43 d't 16ft:

as slowly asdesired. T

itw ill 061; the shaft41 and thus --dis'engage the power operated control; This lSfdBSllI'fl v "ble as it is sometimes necessarytothiio'w out the skip clutch before the,skipreachesits charging position.

- By pulling thelever tO'tHerighh tIie 51 5a is rockedin the'same manner as though it had been pulled upwardly'by the rod 39, that 1 it Will beseen theskipean beoperat-ed both inits-raising andlowering the hand lever to V 43', as desired. Itfis desirable that theihand lever "should" not operate'jduring t eapaw'er'" operation-"for raising the skip; but should be:

used inlowering the skip, sothat itsdescelit i 5 will be regulated;

- From the'foregoing; itjwillEbe' seen-that I have devised a very simpleand efiieientf power control wherein "the refspective lejrers v are thrown into and outof peratibasimplyi link, or any other form. of connection'with 1 desiredjmech msm, to the oneiside'of a cenform "of control mech nism where" a donned ing rod or linkjmay besir'nplyithrownto one side of a center'and'fajmanually.' operated; V

lever may returnitf to the neutral p'ositioni1 Also, it will be seen that the operator does not have togkeep .his'hand onth'e sina'll control handle,"but simply has to throw or rock the same with its pawl intothe'path- -of' acam-and may then immediately remove his I have shown one i I 136 by; the shifting of a: small handle? that will; 4, 19 .in'turn, look its leverfto' an oscillating shaft whereby the lever is then operated'mecltani; 1 i. Cally -It'wfll'alsobeseen that Ihavejdevis'ed' i i a power control that may'swin g' a'connecting V atewiththe power control", so that a'shifti'n gj or mixer, as the control levers are ordinarily somewhat hard to manipulate. The present invention, however, doeswaway with the stren uousefforts heretofore necessary.

he controls might easily be applied to iother machinery just so therejisra driving shaft, so that motion may be transmitted to the'oscillating shaftfrom which all thecontrols are operated; V I

Many slight changesmight'be madewitho'utin any way departing from the spirit and scope of the invention.v Having thus described my inventiom'what Iclaim' as new and desire to'secure by Letters Pa e k I l .7 .1 T 1. A power operating control comprising a control shaft, means-for oscillating said.

V shaft, a control lever loosely mounted on said oscillating shaft, a handle on said control lever means for lockin said handle tosaid control shaft to therebyoperate the, control lev'erbyan oscillationof the control shaft;

2. A: power operating control comprising a control shaft, means for continuously 'oscillating saidcon'trol shaft,'a control lever loosely mounted on said oscillating shaft,

means onJ's'aid control lever "for temporarily locking. said controllever'to said shaft to lation of the controlshaft.

3. A power operating control comprising.

loosely mounted on said oscillating shaft,

' means on said control lever for temporarily looking said control leverto said shaft to v thereby operate the control lever by an oscillation of the control shaft and the said means automatically unlocking from said control shaft after the control lever has been moved by an oscillation of the control shaft.

4L. A power operating control comprising a control shaft, means for continuously oscillating said control shaft, a control lever loosely mounted on said oscillating shaft, a pivotal handle on the end of said control lever for locking said control lever to said shaft to thereby operate'the control leverbv an oscillation in one direction of the conti ol shaft and the said pivotal handle also so arranged that the control lever and handle are unlocked from the control shaft on the return oscillation of said shaft to thereby leave the control lever in its thrown position.

5. A power operating control comprising a control shaft, means for continuously oscillating said control shaft, a control .lever loosely mounted on said oscillating shaft, a cam locked on said shaft, a pivotal handle thereby operate the controllever by an oscilon the end of said control lever for locking the handle'to said cam to thereby operate the control lever by an oscillation of sa d controhshaft and the handle and cam 71 I arranged to unlock immediately'the' control lever has been thrown and thereby leave the control lever in its thrown position.

6. A power operating control comprising a control shaft, means for continuou'slyiosg j cillating said control shaft, a control lever.

loosely mounted onsaid control shaf ,a cam lockedfon said shaft, a' pivotal' handle on the. end of said control lever and means on the handle. for locking thecontrol'lever to Y is the cam to throw thecontrol leverfin either continuouslyoscillating the same, a' control lever loosely mounted on said shaft, cam V provided with atooth lockjed on said shaft adjacent said control lever, a small lockable handlemounted on the end of fsaid llever and provided with a dog whereby when said hang,

dleis forced downwardly said dogwill e'n- 1 gage with said -tooth 1to1; thereby rocklthe control'le'ver was thrown position-and said tooth disengaging fromsa'id dog as the shaft oscillates in the opposite direction, thereby leaving the control levcri inits thrown position,

.81 A'powerloperati ig control comprising an oscillatable control shaft and meansfor continuously oscillating the .same,'a' control lever loosely'mountedon sald shaft, acam rigidly locked on said shaft, Ja handle mounted onjsaidrontrol lever and" provided with v a dog, said handle adapted to be movedto throw the dog 'inthe' pathfof movementof the cam tof thereby lock the control lever "to: the shaft and thus operate said lever and the camunlocking from said dog on the re-' turn oscillation of said shaft to thereby leave the control lever'in its thrown position,--

' 9; j A power control comprising a'rockab'le a shaft'andmeans for'rocking-the same,"a lever mounted on said shaft,a link connected to one end of the lever and a handle provided with a pawl pivoted to the other end .of the lever,

a cam locked on said shaft, and meanson the.

handle for keeping thepawl normally disengaged from the cam, saidhandle when tilted locking the lever ,with said camfan'd' rockable shaft to thereby operatethe lever andlink. V

- 10. In a poweropera'ted'control, a link to be operated,1a rockablefshaft, a lever on said rockable shaft, said lever connected to one end of the link, a pivotal handle connected to the other cud'of the lever, a cam secured to said'r'ocka'ble shaft, a pawl 'on said handle lihk through rockingofsziid'Shaft; '11 Apower'controlcompi'isingalrockable said, oam ;tolj thereby? .oper'ite "theflcveiff and shgift" anclfme a sf forrocking the, same back teinporaiilyflocking;said'clver to, sai

t to i Sha and "saidirec y it m m in. iw ll i e h ft j. an ir s lat ld c llata s fta'mi an 9? i Cillatahle shaft t he contfollecha manually opeiable lever and forth; ti lever, 2i lipk conncct'ed' tof'said 'lycmountc clori saids haft to be coiitrollcd and le'vcr, said leiver loosely mounted oiisaid rock- 7 1 ableshaftg. a ca m securly fastened. to said i f" end ofsaicl lover; 01: interlocking the same [controlled by the manually operated leveri i'ocltablosha lft, means mounted-on theiupper' Y withsizidlcan to therby rockthelever hom sa'id1sl1faft is c i-o'ckd; and means "for automati-' 'P- l l U -Q th m mpa h I 1 o v .12. i In a pgnv 'v control mechanism, a love y; a 'link'con nfctedgato said leverflm osjcillatable r yipuum riiheium le-ha l w;ac m

's haftg' -s i-iid lver. loosely. mounted on the I s hg ft ia camfiwithppp ogitely arranged teeth rigidly mo mtcd' jonfs'aid, Shaina double.-

" toothedi pawl "pivoted clircc'tly above said nica isfoi' holdihg tho: pawl out ,ofl env ga mcnt with said cam, said wlhen ofthe cam to, opcrzitc the lever; in OIl e:d lI 80 t n an id; p w wh n. ti t in the OP- t ":cpositcldin 7 atooit' h tiltcd in o i, direction-locking With Oi ooth power 00 i tifoll compfisingkLa n oscily "s afwnd 'm a s or c in qu ly' s- I logkcdohfiaid shatft'h aving twofoppositely "faced teth, saidl pai'wl provided vwith two op}. pojsiitely 'faceol teeth "so :thjatv tilting of the" v hfd ll'ldlg will throw-one tooth: of tho pawl in engagement with one 'toothi of tho cam t0v i move said-lever in one direction ands aid V l handle when tiltdin' the oppositedirefction V causingthe opposite; tooth of the pawlto 1 r ection Qlevcrc mounted on,saic1 oscillatabl'e shaft,a

engagewith the. pp i e too h of the ,Cam

I tothefneby rock tholcver in the opposite di-,

14. A power t mp r r ly 'lQ he 'i' both? mill iing shaft, a link connecte df;with Said. lever for temporarily locking it' tosjgiidos l trlolledjahd i l nk'f iiec i g id lymountcd 01 1 the shzyftito rbe] shfift andinoe' i'ns,forioscillaiting,th same, a i

h vi m xhe ebni ic op t with ai ar w eby aidgpawe j c r may be temporarily diseng ggdg nd saldj 'sh aft a wn 'Qe r ia 'driv h ft .tQf e 1 ont l a os llat ng ha t; tn's [for] oscillating, the "shaft-fa 1 izzpflqosicly' mounted 'on,sa,id control shaftymcans foi and with the shaft to be driveiii'gind mgtniial me Connected ther li kv for automatiiw y throwing o the p w :0ntrf0 when said manu ailmeans isfoprzitedi j In; a,.powe1 control, a; shaft tojbccom c t shaft,; a vsmzt'll arm on tho-shaft a d l e a lan w y pfi led 1 ii o id i w h man 5 12 amni id Shaft to: e 3611 13 1154.

n" ope ion (if t ma ua y; QPQr I opei ate'dr control foi qcon-f V trollir'ig a; power shaft, 21; small, oscillata'ble cgm lbcked tosaid shaftla pawl pivoted o'li i t operated levei for cooperating with'thc link. it $3 i lover; will disengage the power operat d ,sa fi d a low he; power kfiid b .01

. saidllcvenlmczg s for normally keping the i V "pa li'oufiuiz e m ti-iwi hlthfl c i f 3 h'zincdleffoi rockingthe pawl'within' the path;

fcajd cam tovth ereby jrocktholever Whon said shz ftiogcillatcsg, link 1 arm czgteiiding I rom-fli e er v1 1 pQlilel -shfi s n al y M l-whe by. a: manua Ope i n 2 sa d -ollefchfan oscillating shaftfailevcp'loogsly i 

